低温省煤器运行效果和节能环保分析  

Analysis of Operation Effect and Energy Saving and Environmental Protection of Low Temperature Economizers

作　　者：董琨 井新经 张俊杰 谭厚章[3] 许伟刚[3] 李杨 DONG Kun;JING Xinjing;ZHANG Junjie;TAN Houzhang;XU Weigang;LI Yang(Shenhua Guohua(Beijing)Electric Power Research Institute Co.,Ltd.,Beijing 100025,China;Xi’an TPRI Energy Conservation Technology Co.,Ltd.,Xi’an 710054,China;School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]神华国华(北京)电力研究院有限公司,北京100025 [2]西安西热节能技术有限公司,陕西西安710054 [3]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《锅炉技术》2019年第5期71-75,共5页Boiler Technology

摘　　要：为分析低温省煤器改造前后运行情况和节能环保效果,并解决运行中存在的退出运行等问题,对已投运低温省煤器的14台机组的省煤器进出口烟气温度、运行率、经济性以及对除尘效果的影响进行了分析。结果表明:低温省煤器进口烟温较低、各烟道烟温偏差和变负荷导致的烟温波动易导致低温腐蚀和硫酸氢铵析出,是导致退出运行的主要原因;投运低温省煤器可节煤0.34~1.71 g/(kW·h),降低电除尘出口粉尘浓度19%~48%,节能和环保效果显著。To analyze operation condition and energy saving and environmental protection before and after low temperature economizer retrofit,and to solve problems during operation such as quitting of low temperature economizer,an investigation is performed on fourteen units with low temperature economizers,which focuses on gas temperature,operation rate,economic and dust removal effect at the entrance and exit of low temperature economizer.Results show that gas temperature at the entrance of low temperature economizer is low,therefore gas temperature deviation between different flues and variable load can lead to low temperature corrosion and precipitation of ammonium hydrogen sulfate,which is the main reason for quitting operation;With low temperature economizer put into operation,coal consumption rate decrease by 0.34~1.71 g/(kW·h),and dust concentration at the exit of electrostatic precipitator decrease by 19%~48%,thus significant energy saving and environmental protection effect is achieved.

关 键 词：低温省煤器 运行优化 经济性 发电煤耗 除尘效率 

分 类 号：TK223.33[动力工程及工程热物理—动力机械及工程]